Meanings of mental pabulum in English

Does the absorber of mental pabulum from books argue wrongly from similar premises?

I never heard of such an over-stock of mental pabulum as I found there.

He was not fastidious and both were mental pabulum-ofa sort-togetherwith whatever lay between these extremes.

And we may accept the interest Adela shows in any kind of mental pabulum provided for her, as an analogous sign.

Here, however, were people with excellent intellects, whose craving for mental pabulum, especially in the winter, could be but partially satisfied.

They know what kind of mental pabulum their people crave, and they are no more in business for their health than is the merchant.